CVE-2021-27794

Name: CVE-2021-27794
Creator: NVD / NIST
Published: 2021-08-12T15:15:07.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2021-27794 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A vulnerability in the authentication mechanism of Brocade Fabric OS versions before Brocade Fabric OS v.9.0.1a, v8.2.3a and v7.4.2h could allow a user to Login with empty password, and invalid password through telnet, ssh and REST.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

A vulnerability in the authentication mechanism of Brocade Fabric OS versions before Brocade Fabric OS v.9.0.1a, v8.2.3a and v7.4.2h could allow a user to Login with empty password, and invalid password through telnet, ssh and REST.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.24%

15.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Broadcom	Fabric Operating System	< 7.4.2h
Broadcom	Fabric Operating System	>= 8.0.0, < 8.2.3a
Broadcom	Fabric Operating System	>= 9.0.0, < 9.0.1a

References

https://security.netapp.com/advisory/ntap-20210819-0001/Third Party Advisory
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1552Vendor Advisory
https://security.netapp.com/advisory/ntap-20210819-0001/Third Party Advisory
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1552Vendor Advisory

Timeline

Published: Aug 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27794?

How severe is CVE-2021-27794?

CVE-2021-27794 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27794?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27794?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST